Quote:
Originally Posted by steved28
Stupid question... What do miles on the car have to do with the interior air filter? I hardly had to use my A/C this year at all.
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Well, mileage is used as a unit of measure of how much you've used the ventilation system (air conditioning or not.) The better unit of measure might be the number of minutes the ventilation system is operating, but that's not a function that is tracked by the user or by the car. So instead of trying to invent a new unit of measure to determine the life of the filter, a correlation was made between approximate miles versus degree of dirtiness of the filter.
Using the AC just means that you've got the compressor engaged and are actively cooling the interior of the car. But even if you don't use the AC, but have the blower motor fan on in ventilation mode, you're still drawing in air through the filter.
How often a filter should be changed is really dependent on your driving environment. If you live in a very dusty area (lots of dirt roads, lots of pollen, etc.) then you might need to change more frequently than a place that has very little dust.
2008 Altima Hybrid, Winter Frost, Blonde Cloth, Convenience Package, Floor Mats
Modifications: Parrot CK-3100 hands free phone, XM Radio antenna hidden behind instrument cluster, tinted windows